Question
Physics Question on Refraction Through A Prism
The refractive index of the material of a prism is √2 and the angle of the prism is 30°. One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is
A
60°
B
30°
C
45°
D
Zero
Answer
45°
Explanation
Solution
The correct option is (C): 45°